We're using UUID for primary keys in PG 8.4 without any issues. I have
no real insights into the details or performance issues, but always
figured it was stored as a binary 128-bit value, but with added benefits
of being able to enter and view them using a standard string format. We
don't sort them as they have no real meaning for us.
On 1/4/2011 11:07 AM, Dennis Gearon wrote:
I haven't been able to find anywhere, easily, in the documentation using google
where a list of allowed data types for primary keys is.
So, UUIDs can be primary keys?
Any issues wtih them on sorting or paging of index tables, etc.?
Also, the documentation says that UUIDs are 128 bit value, but never explicitly
says that's how it's stored. Nor does it use one of the nice, blue headered
tables for UUID (or ENUM) showing storage and other attributes as it does for
numeric, character,boolean, date/time, binary, monetary, geometric, or network
types.
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